Sichuan Tongsheng Amino acid Co., Ltd
L-Pyroglutamic acid
L-Theanine
L-Prolinamide

Products
L-Methionine

Product Name:  H- Met-OH                             

CAS#: 63-68-3
Synonyms: L-Methionine                 

Molecular Formula: C5H11NO2S
Molecular Weight: 149.2                      
Specifications:

Item

Standard

Analysis data

Appearance

White crystals or crystalline powder

Conforms

Specific rotation[α]20/D
(C=2 in 6N HCl)

+23.0 to +24.0 Degree

+23.42°

State of solution
(Transmittance)

Clear and colorless not less than 98.0%

98.3%

Chloride (Cl)

Not more than 0.020%

<0.02%

Ammonium (NH4)

Not more than 0.02%

<0.02%

Sulfate (SO4)

Not more than 0.020%

<0.02%

Iron (Fe)

Not more than 10ppm

<10ppm

Heavy metal(Pb)

Not more than 10ppm

<10ppm

Arsenic(As2O3)

Not more than 1ppm

<1ppm

Other Amino Acids

Not detectable

Conforms

Loss on drying

Not more than 0.20%

0.19%

Residue on ignition(sulfated)

Not more than 0.10%

0.07%

Assay

99.0% to 101.0%

99.0%

pH

5.6 to 6.12

5.8

Inspector:

 

Manager:

 

Conclusion

The product is according with standard.


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